Abstract
Development and reproductive potential of the Coccinella septempunctata L. (CSL) was conducted underlaboratory conditions to determine its fecundity and longevity on natural and artificial diets. Tests were made onlaboratory rearing materials and all development stages were carefully recorded. Success ratios in theseexperiments were a matter of logistic and synchronization of these life cycles, the plant phytophagous andentomophagous insects. A positive correlation was obtained between food consumption and egg production, sofecundity of CSL is affected by the type of food. CSL consumed highly significant (Rhopalosiphum maidis) 32.2aphids per day as compared to other treatments. Oviposition response was the maximum on these beetles whichconsumed 1st and 2nd instars of Macrosiphon roseae. CSL reared under artificial diet showed more longevity 41.6days on plain water. Greater emphasis was pertinent on evaluation of predator specificity, understanding ofcolonization in new environments and assessment of community-level interactions to maximize the use ofCoccinellids in Biological Control (BC).
Highlights
In many studies it is known that Coccinella septempunctata L. (CSL) commonly called Lady bird beetle is a capable predator and can be used for the biological control of T. tabaci and T. vaporariorum in a greenhouse (Solomon, 1949)
It is known that fecundity of CSL is affected by the quality of food eaten, so there is a positive correlation between food consumption and egg production (Ibrahim, 1955)
The results of this study prove that difference in egg lying of CSL is due to temperature fluctuation (Katsarou, 2005)
Summary
In many studies it is known that Coccinella septempunctata L. (CSL) commonly called Lady bird beetle is a capable predator and can be used for the biological control of T. tabaci and T. vaporariorum in a greenhouse (Solomon, 1949). It is demonstrated in previous studies that CSL responds to olfactory cues from their aphid prey and can even distinguish between aphid species on volatiles (Sengonca, 1994). CSL is considered to be an important bio-control agent for soft-bodied insects such as aphids, white flies, jassids and small lepidopterous larvae which were among the first to be used in this fashion (Victor, 1997). The CSL larva gains size from 1 to 4-7mm in 10-30 days time span depending on food availability. It has two generations before onset of winter and hibernation activity (Katsarou, 2005). The life cycle of CSL is ranging from 19-24 days depending on prey species they feed. It was an aim to explore the food and environment correlation for population density and life span of CSL and its importance as BCM as environment friendly technique
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